66: Ten per cent of twenty plus twenty per cent of ten equals

(a) 10 per cent of 20

(b) 20 per cent of 20

(c) 1 per cent of 200

(d) 2 per cent of 200
67: Assertion (A) :

A tennis ball will bounce higher in Calcutta than it would in Shimla.

Reason (R) :

The downward pull due to gravity is less and air is more rarefied in Shimla than in Calcutta.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not a correct explanation of A

(c) A is true but R is false

(d) A is false but R is true
68: Which of the following is / are unique characteristic / characteristics of equatorial forests?

1. Presence of tall, closely set trees with crowns forming a continuous canopy

2. Coexistence of a large number of species

3. Presence of numerous varieties of epiphytes

Select the correct answer using the codes given below.

(a) 1 only
(b) 1 and 3 only
(c) 2 and 3 only
(d) 1, 2 and 3
69: A father is now three times as old as his son. Five years back, he was four times as old as his son. The age of the son is

(a) 12 years

(b) 15 years

(c) 18 years

(d) 20 years
70: With reference to 'Pradhan Mantri Fasal Bima Yojana', consider the following statements:

1. Under this scheme, farmers will have to pay a uniform premium of two percent for any crop they cultivate in any season of the year.
2. This scheme covers post-harvest losses arising out of cyclones and unseasonal rains.

Which of the statements given above is/are correct?

(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2